2661166172 has 24 divisors (see below), whose sum is σ = 5452147680. Its totient is φ = 1112682240.

The previous prime is 2661166153. The next prime is 2661166181. The reversal of 2661166172 is 2716611662.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1157897 + ... + 1160192.

It is an arithmetic number, because the mean of its divisors is an integer number (227172820).

Almost surely, 2^2661166172 is an apocalyptic number.

It is an amenable number.

2661166172 is an abundant number, since it is smaller than the sum of its proper divisors (2790981508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2661166172 is a wasteful number, since it uses less digits than its factorization.

2661166172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2318141 (or 2318139 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 2661166172 is about 51586.4921466851. The cubic root of 2661166172 is about 1385.7684348901.

The spelling of 2661166172 in words is "two billion, six hundred sixty-one million, one hundred sixty-six thousand, one hundred seventy-two".